Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
cac truc » cau truc, cac tru, cac trung
thanh ve » hanh ve, thanh va, thanh van
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
qua cac » cua cac
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach ky lang xa hoi. hieu qua cac truc va ((thanh ve) or (thanh vien)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky lang xa hoi. hieu qua cac truc va ((thanh ve) OR (thanh vien)) cua tre.
• Adding a wildcard symbol may retrieve word variants: bo sach ky lang xa hoi. hieu qua cac truc va ((thanh ve) or (thanh vien)) cua tre*.